Trickle ICE

[feross]

During the training, we briefly discussed the different ways to handle ICE candidates, suggesting that you listen to the icecandidate event in order to send candidates to the remote peer as soon as they're available. This is called "trickle ICE".

A simpler (but much slower) way to send candidates to the other side is to use vanilla ICE. In this process, you just gather all the candidates and send them over as part of the offer/answer.

This article I just found has an excellent explanation and history of ICE: http://webrtchacks.com/trickle-ice/ I found it very interesting.